Sectional steam-boiler



(No Model.)

L. W. CHADWIGK. SEUTIONAL `STEAM BOILER. Nm. 249,585 N mi Patented Nov.V 51881;

ruf-:15gg: FQ E tu WITNBSSBS:

caf-M g m NVBNTOR.:

y UNITED STATES 'PATENT OFFICE,

LAWRENCE W. cHADwIcK, or sHENANDoAH IRON WoRKs, VIRGINIA.

SPECIFICATION forming part of Letters Patent No. 249,585, dated November `15, 1881.l Y

` Applicationled August 5, 1881. (Nomodel.) v

To all whom it may concern;

Be it known that I, LAWRENCE W. OHAD- WIOK, of Shenandoah Iron Works, in thecouuty of Page and State of Virginia, have invented 'a new and Improved Sectional4 Steam-Boiler, of which the followin gis a full, clear, and eX- act specification. y

The object of this inventlon is to provide a cheap, strong, and economical boiler for generating steam for heating or mechanical purposes. l l l Theinvention consists of a boiler composed of several horizontal water and steam charnbers set one above the other within a casing or shellclosely fitting against their edges and supported and connected by verticaland horizontal water-circulatin g pipes and Ts, the said chambers having vertical openings through them, that serve as lues for the passage of the products ot' combustion; and it consists, furl ther, in combination with the chambers and tubes, of a tire-place, water-front, and of novel pipe-coupling devices, allof which will be hereinafter set forth.

Figure l is a sectional side elevation of'my improved boileron line 0o Fig. 2. Fig. 2 is a sectional elevation on line yay, Fig. 1. Fig. 3 represents sectional details of a reducer used in connecting the boiler-pipes.

Similar letters ot' reference indicate corresponding parts. l

In the drawings, A represents the lower water-chamber, surrounding the ash-pit A on three sides; and B B G represent,respectively,

the horizontal water andsteam chambers, that are arranged successively above the chamber A at suitable distances apart. Each of these chambers A B C has a iiange, `A2, Vextending on all sides from its top,'through which ilange A2 are passed the vertical tie-rods D, that are held in place by nuts a.

rlhe shell or casing of the boiler is -`constructed in corner sections, E E, and side sections, F F, the former of which are set on end between the boiler-chamber ilanges A2, and are held in place by the tie-rods D, on which they are pivoted, while the sections F F, that have their innerfi'aces almost in contactwith several chambers, B B C, are made to slide in and out on swinging the corner sections, E l

E, aside, so that the boiler may bceasily in! spected and repaired. In this instance three that repairs or renewal of parts can bejinost `easily effected. Near their cireumference's these chambers A B C are `preferablycon-` nected by pipes G, that are screwed into .the bottoms of the chambers B (hand have `screwed in their lower ends reducers H, which connect .with pipes f, `that areiu turn screwed into the tops of the chambers A B.

. The Ts I are preferably used for` ,makingl connection betweenthe central portions ofthe chambers A B C, thereby stilening theA boiler somewhat laterally, and at `theisame time presenting horizontal `pipes to the action ofthe These TsI are lo- `products of combustion.

catedon a central line from front to rear of the boiler, and connect with the bottoms of the chambers B C along this central line by pipes a a a. Into the side openings of these Ts I are screwed short pipes b, on which areA elbows c, that are connected with reducers Hby short pipes d, and from these reducers H short pipes f connect with the tops of the chambers A B. The central and lower openings of most of these Ts I communicate, by means of a short pipe, g, reducer H, and pipe f, with the tops ofthe chambers AB 5 but directly over the tire-chamber A3tl`1reeway Ts are substituted forthe four-way Ts, and y defining or making the roofof the tire-chamber A3.

The reducers H consist of conically-shaped cups interiorly screw-threaded at the top to connect with the pipes there entering them, and having their bases reduced and tapered, as

shown at m, to receive the small pipes connectl ing them with the tops of the chambers A B,

and these smallpipes f, thatconnectwith the bottoms ofthe reducers H, have a tapering upper end, as shown at n, and bothfends right screw-threaded. And when the boiler is put together the pipes f are inserted from the top through the lower ends of the reducers H, and the latter screwed in place on the ends of the pipes above them, and then'the pipes fare turned to the right, and thereby screwed into IOC) the chambers A B, and at the same time tightly screwed down in the reducers H. .Thus it will be seen that no left-hand screw-thread is required, and the connecting-pipes f are readily and easily adjusted, and when screwed tightly down serve, in effect, as so many stay-bolts.

Above the fuel-opening is a water-chamber,

. K, that forms the front of thetire-chamber' A3;

`chamber O may be superheated.

vand reducers, over the chamber A and against` vthe bottom of thelower chamber, B, up through a flue, L, in the rear portion of the latter chamber; then forward and-up through the continua-` tion of the iiue L, formed through the front part of the upper chamber, B; thence rearward and up through a iiue, L, formed through the rear part of the steam-chamber (l. Thus it will be seen that all parts of the boiler are exposed to "the heat from the fire, an unusually extended fire-surface is obtained, and the steam in the Steam is taken from the chamber C through the steampipe M, and the water is supplied to the boiler 'l through the supply-pipe N into the chamber A.

I do not confine myselfto the construction of the boiler preciselyr as herein shown, as the `chambers A B C Kmay be of other than rectangular cross-section, and other modifications may be made without departing from my invention. The chambers A B G K may be each cast entire o'r in flanged sections, as indicated in Fig. 1, wherein the sections of chamber A are held together by bolts s passing through the flanges p.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patentl. Anvimproved sectional steam-boiler consistin g of a series of horizontal water and steam chambers provided with alternate opposite vertical fines, and arranged one above the other, and connected by vertical and horizontal pipes and Ts, substantially as and for the purpose set forth.

2. In a steam-boiler, the combinatiom with the laterally-flanged water and steam chambers A B (l and the bolts D, ofthe pivoted shell-sections E and sliding shell-sections F, substantiallyras herein shown a-nd described, said sections being movable to permit inspection of l the boiler, as set forth.

3. rBhe combinatiomwith the water and steam chambers-AB 0,0f the pipes Gfand redncers H, substantially as herein shown and described.

4. The combinatiomwith 'the pipe G and the water and steam chambers B G, of the reducer H, provided with a reduced tapering screwthreaded bore, m, and the tapering pipef, screwthreaded in the same direction at each end, substantially as and for the purpose described.

LAWRENCE W. CHADVVICK.-`

Witnesses:

WM. MILNET, Jr., J. R. DEAcoN. 

